U.S. patent application number 16/800492 was filed with the patent office on 2020-06-18 for drawer pull-out guide.
The applicant listed for this patent is Julius Blum GmbH. Invention is credited to Ingo GASSER, Marc MEUSBURGER, Elvis MUSIC, Emanuel NETZER.
Application Number | 20200187648 16/800492 |
Document ID | / |
Family ID | 63079680 |
Filed Date | 2020-06-18 |
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United States Patent
Application |
20200187648 |
Kind Code |
A1 |
MEUSBURGER; Marc ; et
al. |
June 18, 2020 |
DRAWER PULL-OUT GUIDE
Abstract
A drawer pull-out guide including a first guide rail, a second
guide rail displaceably supported relative to the first guide rail,
and a running carriage having load-transmitting rolling bodies and
which is displaceably supported between the first guide rail and
the second guide rail. The running carriage includes at least three
rolling bodies, and each of the at least three rolling bodies has a
cylindrical from and is rotatable about a horizontally extending
axis in a mounted position of the drawer pull-out guide. The at
least three rolling bodies of the running carriage, in the mounted
position of the drawer pull-out guide, are arranged in at least
three running planes lying above one another.
Inventors: |
MEUSBURGER; Marc; (Egg,
AT) ; MUSIC; Elvis; (Lindau, DE) ; NETZER;
Emanuel; (Hoechst, AT) ; GASSER; Ingo;
(Hoechst, AT) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Julius Blum GmbH |
Hoechst |
|
AT |
|
|
Family ID: |
63079680 |
Appl. No.: |
16/800492 |
Filed: |
February 25, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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PCT/AT2018/060152 |
Jul 18, 2018 |
|
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16800492 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47B 88/43 20170101;
F16C 29/048 20130101; A47B 88/437 20170101; A47B 88/487 20170101;
A47B 2210/0056 20130101; F16C 29/045 20130101; F16C 29/008
20130101; F16C 2314/72 20130101; A47B 2210/004 20130101 |
International
Class: |
A47B 88/487 20060101
A47B088/487; A47B 88/437 20060101 A47B088/437 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 30, 2017 |
AT |
A 50723/2017 |
Claims
1. A drawer pull-out guide, comprising: a first guide rail and at
least one second guide rail displaceably supported relative to one
another, at least one running carriage having load-transmitting
rolling bodies, the at least one running carriage being
displaceably arranged between the first guide rail and the at least
one second guide rail, wherein the at least one running carriage
includes at least three rolling bodies, each of the at least three
rolling bodies has a cylindrical form and is rotatable about a
horizontally extending axis in a mounted position of the drawer
pull-out guide, wherein the at least three rolling bodies of the
running carriage, in the mounted position of the drawer pull-out
guide, are arranged in at least three running planes lying above
one another.
2. The drawer pull-out guide according to claim 1, wherein the at
least three rolling bodies--in a view onto a plane extending
perpendicular to a longitudinal direction of the guide rails--are
arranged so as to be laterally offset to one another.
3. The drawer pull-out guide according to claim 1, wherein a first
rolling body of the at least three rolling bodies--in a view onto a
plane extending perpendicular to a longitudinal direction of the
guide rails--adopts a lowest position relative to a second rolling
body and to a third rolling body, and the second rolling body and
the third rolling body are entirely arranged above the first
rolling body.
4. The drawer pull-out guide according to claim 1, wherein at least
two of the at least three rolling bodies--in a view onto a plane
extending perpendicular to a longitudinal direction of the guide
rails--are only partially arranged above one another.
5. The drawer pull-out guide according to claim 1, wherein the at
least three rolling bodies are spaced from each other along a
direction extending in a longitudinal direction of the guide
rails.
6. The drawer pull-out guide according to claim 1, wherein each of
the at least three rolling bodies--in relation to the at least one
running carriage--is arranged so as to be stationary in a
longitudinal direction of the running carriage.
7. The drawer pull-out guide according to claim 1, wherein the axes
of the rolling bodies are each arranged in the three running planes
lying above one another.
8. The drawer pull-out guide according to claim 1, wherein at least
two, preferably three, of the at least three rolling bodies each
have a different diameter.
9. The drawer pull-out guide according to claim 8, wherein the
rolling body, that is arranged on a front-end of the running
carriage, of the at least three rolling bodies has a diameter being
less than a diameter of the other rolling bodies.
10. The drawer pull-out guide according to claim 1, wherein a first
rolling body of the at least three rolling bodies belongs to a
first group of rolling bodies, a second rolling body of the at
least three rolling bodies belongs to a second group of rolling
bodies, and a third rolling body of the at least three rolling
bodies belongs to a third group of rolling bodies, wherein each the
first, second and third group of rolling bodies each have a
plurality of rolling bodies being arranged in a same running
plane.
11. The drawer pull-out guide according to claim 1, wherein the
drawer pull-out guide includes a third guide rail to be fixed to a
drawer, wherein the first guide rail is to be fixed to a furniture
carcass and wherein the second guide rail is displaceably supported
between the first guide rail and the third guide rail.
12. The drawer pull-out guide according to claim 1, wherein one
guide rail has a side limb and a transverse limb connected to the
side limb via a rabbet, wherein at least one rolling body is
configured to run along the transverse limb and at least one
further rolling body is configured to run along the rabbet.
13. The drawer pull-out guide according to claim 1, wherein the at
least one running carriage has three limbs aligned substantially
horizontally in the mounted position, at least one of the three
rolling bodies is supported on each of the limbs, wherein it is
preferably provided that the rolling bodies are passed through the
limbs.
14. The drawer pull-out guide according to claim 13, wherein the
limbs are connected to one another by two connecting limbs aligned
substantially vertically in the mounted position, wherein it is
preferably provided that at least one of the connecting limbs has a
lateral supporting roller, wherein it is preferably provided that
the lateral supporting roller is passed through that connecting
limb.
15. The drawer pull-out guide according to claim 13, wherein one
limb aligned substantially horizontally in the mounted position
extends substantially over an entire width of at least one of the
guide rails, wherein it is preferably provided that this limb
adopts a lowest position in relation to the two other limbs.
16. The drawer pull-out guide according to claim 13, wherein one of
the limbs aligned substantially horizontally in the mounted
position has a width which is substantially twice as wide as one of
the two other limbs.
17. The drawer pull-out guide according to claim 1, wherein the at
least one running carriage, in a cross-section, has a substantially
U-shaped or a substantially C-shaped configuration.
18. The drawer pull-out guide according to claim 1, wherein the at
least one running carriage has a length, and a region in which the
three superposed rolling bodies are arranged, extends over only a
part of the length of the at least one running carriage.
19. A drawer comprising at least one drawer pull-out guide
according to claim 1 for moving the drawer relative to a furniture
carcass.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a drawer pull-out guide
including a first guide rail, at least one second guide rail
displaceably supported relative to one another, and a running
carriage having load-transmitting rolling bodies and being
displaceably arranged between the first guide rail and the second
guide rail. The running carriage includes at least three rolling
bodies, each of the at least three rolling bodies has a cylindrical
form and is rotatable about a horizontally extending axis in a
mounted position of the drawer pull-out guide.
[0002] With drawer pull-out guides, running carriages are utilized
for transmitting a load of the drawer, and the running carriage
enables a low-frictional and precise translation of the guide rails
to one another. These running carriages (or cages of running
carriages) include rolling bodies (for example in the form of
cylinders, balls or cones) configured to run along running limbs
provided on the guide rails, so that the guide rails can be
glidingly supported relative to one another.
[0003] WO 2007/108601 A1 and DE 31 27 701 A1 disclose non-generic
drawer pull-out guides, in which the load-transmitting rolling
bodies are configured as balls which are arranged in a common
running carriage. These ball guides have the drawback that the
useable width of the balls, due to their spherical surface, is only
used to an extent of approximately 70%, i.e. approximately 30% of a
width of the balls waste constructional space and increase the
weight. Moreover, the contact surface of the balls to the guide
rails is only configured so as to be "punctiform", and that point
contact--besides a small supporting surface--also leads to a high
surface pressure and, therefore, to undesired deformations of the
balls.
[0004] DE 296 19 413 U1 and DE 43 37 485 A1 disclose extension
guides for drawers, in which cylindrical running rollers having a
horizontal rotational axis are arranged in two running planes lying
above one another. In addition thereto, lateral compensation
rollers with a vertical rotational axis are provided for guiding
the extension rail relative to the carcass rail in a lateral
direction. The load-transmitting running rollers and the lateral
compensation rollers are supported in a common running
carriage.
[0005] WO 2017/106889 A1 discloses a drawer pull-out guide having a
carcass rail, a central rail and a drawer rail, and running
carriages with load-transmitting rolling bodies are displaceably
arranged between each of these rails.
SUMMARY OF THE INVENTION
[0006] It is an object of the present invention to propose a drawer
pull-out guide of the type mentioned in the introductory part,
having a stable and compact construction of the running
carriage.
[0007] According to the invention, the at least three rolling
bodies of the running carriage, in the mounted position of the
drawer pull-out guide, are arranged in at least three running
planes lying above one another.
[0008] Accordingly, the running carriage includes at least three
rolling bodies or at least three groups of rolling bodies, and the
rotational axes of which are each arranged in running planes
separate from one another and, in the mounted position of the
drawer pull-out guide on a furniture carcass, are spaced from one
another in a height direction.
[0009] This is, in view of the previously mentioned WO 2007/108601
A1 and DE 31 27 701 A1, not an obvious measure, because the drawer
pull-out guides and running carriages shown in these references
would have to be considerably modified for the use with cylindrical
rollers having horizontally extending rotational axes.
[0010] Besides a stable and compact construction, the danger of
deformations of the rolling bodies can be reduced, because the
occurring forces can be distributed over a larger area due to the
arrangement of the at least three rolling bodies lying in different
running planes. As a result, each single rolling body is subjected
to a reduced load. A further advantage of the invention lies in the
fact that--in particular with restricted space conditions within a
rail profile of the guide rails, for example due to a bent rabbet
of a guide rail, a stable interconnection of a rolling body lying
in one running plane with the other rolling bodies lying in other
running planes can be brought about.
[0011] According to an embodiment, the at least three rolling
bodies--in a view onto a plane extending perpendicular to a
longitudinal extension of the guide rails--can be arranged so as to
be laterally offset to one another. By virtue of such a three-point
support, it is possible that lateral tilting moments, which are
exerted due to a load of the drawer onto the guide rails, can be
transmitted via the rolling bodies which are laterally arranged
offset to one another and can therefore be absorbed in an improved
manner.
[0012] With possible embodiments of the invention: [0013] a first
rolling body of the at least three rolling bodies--in a view onto a
plane extending perpendicular to a longitudinal direction of the
guide rails--adopt a lowest position relative to a second rolling
body and to a third rolling body, and the second rolling body and
the third rolling body are entirely arranged above the first
rolling body, and/or [0014] at least two of the at least three
rolling bodies--in a view onto a plane extending perpendicular to a
longitudinal direction of the guide rails--are only partially
arranged above one another, and/or [0015] the at least three
rolling bodies are spaced from each other along a direction
extending in a longitudinal direction of the guide rails.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Further details and advantages of the present invention will
be explained with the aid of the following description of figures,
in which:
[0017] FIG. 1 is a perspective view of an item of furniture having
drawers being displaceably supported relative to a furniture
carcass by drawer pull-out guides,
[0018] FIG. 2 shows a drawer pull-out guide which is to be
connected to a drawer sidewall,
[0019] FIG. 3 is a perspective view of the first guide rail to be
fixed to the furniture carcass together with two running carriages
separate from one another,
[0020] FIG. 4a, 4b are perspective views of a running carriage
having a tooth arrangement and a cage of the running carriage,
[0021] FIG. 5a, 5b are cross-sectional views of the guide rails
with the rolling bodies in two different embodiments.
DETAILED DESCRIPTION OF THE INVENTION
[0022] FIG. 1 shows an item of furniture 1 having a cupboard-shaped
furniture carcass 2, and drawers 3 are displaceably supported
relative to the furniture carcass 2 by drawer pull-out guides 4.
Each of the drawers 3 includes a front panel 5, a drawer bottom 6,
drawer sidewalls 7 and a rear wall 8. Each of the drawer pull-out
guides 4 includes a first guide rail 9 configured to be fixed to
the furniture carcass 2 by fastening sections 12a, 12b, and at
least one second guide rail 10 configured to be displaceable
relative to the first guide rail 9. In the shown embodiment, a
third guide rail 11 to be fixed to the drawer 3 is further
provided, and the second guide rail 10 in the function of a central
rail for increasing an extension of the drawer 3 is displaceable
between the stationary first guide rail 9 and the third guide rail
11.
[0023] FIG. 2 shows an arrangement with a drawer pull-out guide 4
and a drawer sidewall 7 in a perspective view. Each of the
fastening sections 12a, 12b of the first guide rail 9 includes one
or a plurality of fastening locations 13, 14 for fixing to the
furniture carcass 2. The third guide rail 11 is connected or is
configured to be releasably connected to the drawer sidewall 7, and
the second guide rail 10 is displaceable between the first guide
rail 9 and the third guide rail 11. A coupling element 21 is
arranged on the third guide rail 9, the coupling element 21 being
configured to be releasably coupled to an entrainment member 20 of
a retraction device 18. Therefore, the third guide rail 11, at the
end of the closing movement, can be engaged by the entrainment
member 20 and can be retracted into a closed end position by a
force storage member of the retraction device 18. By a damping
device 19, preferably having a hydraulic piston-cylinder-unit, this
spring-assisted retraction movement of the third guide rail 11 can
be dampened until reaching the closed end position.
[0024] The drawer sidewall 7 is configured as a hollow-chamber
profile having an inner profiled wall 7a and an outer profiled wall
7b. The drawer sidewall 7 has a channel 17 configured so as to be
open to the bottom and extending in a longitudinal direction of the
drawer sidewall 17, and the third guide rail 11 of the drawer
pull-out guide 4 can be arranged in the channel 17. The drawer
sidewall 7 further includes a first fastening device 15a configured
to be connected to the rear wall 8, a second fastening device 15b
configured to be connected to the front panel 5, and a support
portion 16 for supporting the drawer bottom 6.
[0025] FIG. 3 shows the first guide rail 9 with the fastening
sections 12a, 12b to be fixed to the furniture carcass 2. The first
guide rail 9, in a cross-section, includes a U-shaped or a C-shaped
section, in which a running carriage 22 and further running
carriage 23 separate from the running carriage 22, for guiding and
supporting the second guide rail 10, are displaceably supported.
The running carriage 22 includes load-transmitting rolling bodies
24, 25, 26, and the rotational axes of which are spaced from one
another in a height direction. Accordingly, the rotational axes of
the rolling bodies 24, 25, 26 are arranged in running planes A, B,
C (see FIG. 5a, FIG. 5b) separate from one another. The running
carriage 22 further includes lateral supporting rollers 27, the
supporting rollers 27 having rotational axes extending vertically
in the mounted position. The lateral supporting rollers 27, on the
one hand, are configured to run along a vertical limb of the first
guide rail 9, the vertical limb extending in the longitudinal
direction (L). On the other hand, the supporting rollers 27 are
configured to run along a vertically extending limb 10c (see FIG.
5a, FIG. 5b) of the second guide rail 10. By a tooth arrangement 28
arranged or formed on the running carriage 22, a movement of the
running carriage 22 can be synchronized, via a pinion, with a
movement of a further running carriage which is displaceably
supported between the second guide rail 10 and the third guide rail
11.
[0026] FIG. 4a shows the running carriage 22 in a perspective view.
The running carriage 22 includes a cage 32 in which the rolling
bodies 24, 25, 26 and the lateral supporting rollers 27, 31 are
arranged so as to be stationary relative to the cage 32 in a
direction extending in a longitudinal direction (L) of the running
carriage 22. The tooth arrangement 28, together with the cage 32,
can have a one-piece configuration, or--as shown in the figure--can
be releasably fixed to the cage 32. For this purpose, the tooth
arrangement 28 has tabs 29 spaced from each other in the
longitudinal direction (L), and the tabs 29 engage, in the mounted
position of the tooth arrangement 28, into corresponding recesses
30 (see FIG. 4b) of the cage 32 in a form-locking manner. Each of
the rolling bodies 24, 25, 26 arranged in different running planes
A, B, C is rotationally supported about a horizontally extending
axis.
[0027] FIG. 4b shows the cage 32 of the running carriage 22, in
which the recesses 30 for releasably receiving the tabs 29 of the
tooth arrangement 28 are clearly visible. The first rolling bodies
24 are arranged in a first running plane A, the second rolling
bodies 25 are arranged in a second running plane B, and the third
rolling bodies 26 are arranged in a third running plane C. The
first running plane A, the second running plane B and the third
running plane C are spaced from one another in a height direction
in the mounted position of the drawer pull-out guide 4 on the
furniture carcass 2. The rolling bodies 24, 25, 26 can be arranged
so as to be spaced from one another in a direction extending in the
longitudinal direction (L). All rolling bodies 24, 25, 26 have a
cylindrical shape. Moreover, it is also possible that each of the
rolling bodies 24, 25, 26 has a different diameter. Thereby, it can
be provided that the rolling bodies 24 of the at least three
rolling bodies 24, 25, 26, which are supported on a front-end of
the running carriage 22, have a diameter being less than a diameter
of the other rolling bodies 25, 26.
[0028] According to an embodiment, it can be provided that the at
least one running carriage 22 includes three limbs 34a, 34b, 34c
aligned substantially horizontally in the mounted position, and at
least one of the at least three rolling bodies 24, 25, 26 is
supported on each of the limbs 34a, 34b, 34c. Preferably, it can be
provided that the rolling bodies 24, 25, 26 are passed through the
limbs 34a, 34b, 34c. In the shown figure, the limbs 34a, 34b, 34c
are connected to one another by two connecting limbs 35a, 35b
aligned substantially vertically in the mounted position. It is
preferably provided that at least one of the connecting limbs 35a,
35b includes at least one lateral supporting roller 31. Preferably,
the supporting roller 31 is passed through the connecting limb 35a,
35b.
[0029] One of the limbs 34a, 34b, 34c extending substantially
horizontally in the mounted position can extend substantially over
an entire width of at least one of the guide rails 9, 10. It is
preferably provided that the limb 34a adopts a lowest position
relative to the two other limbs 34b, 34c. One of the limbs 34a,
34b, 34c extending substantially horizontally in the mounted
position can have a width being substantially double than a width
of at least one of the other two limbs 34b, 34c.
[0030] The at least one running carriage 22, in a cross-section,
can have a substantially U-shaped or a substantially C-shaped
configuration.
[0031] As can be seen from FIG. 4a, the at least one running
carriage 22 can have a length 36, and the region 37 in which the at
least three superimposed rolling bodies 24, 25, 26 are arranged,
extends over only a part of a length 36 of the at least one running
carriage 22.
[0032] FIG. 5a shows the first guide rail 9 and the second guide
rail 10 of the drawer pull-out guide 4 in a cross-sectional view,
the second guide rail 10 being displaceable relative to the first
guide rail 9. The cage 32 of the running carriage 22 is hidden for
the sake of improved overview. The second guide rail 10 includes a,
preferably vertical, side limb 10a and a, preferably horizontal,
transverse limb 10b, the transverse limb 10b being connected to the
side limb 10b via a rabbet 33. The first rolling bodies 24 are
configured to run along a running limb of the first guide rail 9 in
the longitudinal direction (L). The second rolling bodies 25 are
configured to roll along the transverse limb 10b, and the third
rolling bodies 26 are configured to roll along the rabbet 33 of the
second guide rail 10. In the shown embodiment, at least one first
rolling body 24 and at least one third rolling body 26 are
configured to run along the rabbet 33 in running planes A, C
separate from one another. Visible is a lateral supporting roller
31 of the running carriage 22, the lateral supporting roller 31
having a vertically extending rotational axis and being configured
to run between the first guide rail 9 and the vertically extending
side limb 10a of the second guide rail 10. Each of the rolling
bodies 24, 25, 26 is rotationally supported about a horizontally
extending axis in the mounted position, and each of the axes of the
rolling bodies 24, 25, 26 are arranged in three running planes A,
B, C lying above one another.
[0033] An improved support for compensating for lateral tilting
moments is then provided, if the rolling bodies 24, 25, 26--in a
view onto a plane extending perpendicular to the longitudinal
direction (L) of the guide rails 9, 10 (thus in a view onto a plane
orthogonal to the longitudinal direction (L)--are arranged so as to
be laterally offset to one another. Moreover, it can be provided
that the first rolling body 24 of the at least three rolling bodies
24, 25, 26--in a view onto a plane extending perpendicular to the
longitudinal direction (L) of the guide rails 9, 10--adopts a
lowest position relative to a second rolling body 25 and to a third
rolling body 26, and the second rolling body 25 and the third
rolling body 26 are entirely arranged above the first rolling body
24. In the Figure, it is moreover shown that at least two rolling
bodies 25, 26 of the at least three rolling bodies 24, 25, 26--in a
view onto a plane extending perpendicular to the longitudinal
direction (L) of the guide rails 9, 10--are only partially arranged
above one another. The transverse limb 10b of the second guide rail
10 is connected to a vertically extending limb 10c, and the lateral
supporting rollers 27 having vertical rotational axes are
configured to run between the first guide rail 9 and the vertically
extending limb 10c of the second guide rail 10.
[0034] FIG. 5b shows a cross-sectional view of the guide rails 9,
10 with a slightly modified arrangement of the rolling bodies 24,
25, 26. Instead of the rolling bodies 24 according to FIG. 5a, in
which the rolling bodies 24 are arranged in laterally spaced manner
from one another in the common running plane A, a single rolling
body 24 having a larger width is provided in FIG. 5b.
[0035] With all embodiments, it can be provided that a first
rolling body 24 of the at least three rolling bodies 24, 25, 26
belongs to a first group of rolling bodies, a second rolling body
25 of the at least three rolling bodies 24, 25, 26 belongs to a
second group of rolling bodies, and a third rolling body 26 of the
at least three rolling bodies 24, 25, 26 belongs to a third group
of rolling bodies. Each of the first, second and third group of
rolling bodies can include a plurality of rolling bodies 24, 25, 26
which are arranged in a same running plane A, B, C. Moreover, it
can be provided that the plurality of rolling bodies 24, 25, 26,
which are arranged in a same running plane A, B, C, are spaced from
one another in a longitudinal direction (L) of the running carriage
22 and/or are arranged so as to be laterally offset to one
another.
* * * * *